Mercurial > gnulib
view doc/posix-functions/ctime.texi @ 40139:3bacbf659cc9
ttyname_r: Work around bug on Android 4.3.
* m4/ttyname_r.m4 (gl_FUNC_TTYNAME_R): Test whether ttyname_r is a stub.
* lib/ttyname_r.c (ttyname_r): Implement for Android.
* doc/posix-functions/ttyname_r.texi: Mention the Android bug.
* doc/posix-functions/ttyname.texi: Likewise.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 26 Jan 2019 11:56:31 +0100 |
parents | 543dc98caeeb |
children |
line wrap: on
line source
@node ctime @section @code{ctime} @findex ctime POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/ctime.html} Gnulib module: ctime Portability problems fixed by Gnulib: @itemize @item On native Windows platforms (mingw, MSVC), this function works incorrectly when the environment variable @code{TZ} has been set by Cygwin. @end itemize Portability problems not fixed by Gnulib: @itemize @item This function may overflow its internal buffer if an invalid year is passed. @item The @code{ctime} function need not be reentrant, and consequently is not required to be thread safe. Implementations of @code{ctime} typically write the timestamp into static buffer. If two threads call @code{ctime} at roughly the same time, you might end up with the wrong date in one of the threads, or some undefined string. There is a re-entrant interface @code{ctime_r}. @item Native Windows platforms (mingw, MSVC) support only a subset of time zones supported by GNU or specified by POSIX. @xref{tzset}. @end itemize A more flexible function is @code{strftime}. However, note that it is locale dependent.